JewelStop 14k Solid White Gold 0.6mm Box Chain Spring Ring with Extendable & Adjustable 16-18", 1gr. JewelStop box chain necklace that has been beautifully designed. The white gold chain necklace has been crafted in 14k gold. The necklace is white gold in color. The box chain necklace has an unlimited 1 year warranty and 30 days money back guarantee. The product dimensions are: 18" long and 0.6mm in width.